Robust Integral Backstepping control for Optimal Power Extraction of a PMSG-based Variable Speed Wind Turbines

Abstract

This paper investigates a robust control strategy for optimizing the maximum power captured in Wind Energy Conversion Systems (WECS) based on permanent magnet synchronous generators (PMSG) with variable speed. To track the maximum power point (MPP), the rotational speed of the PMSG is controlled via the machine side converter (MSC). In order to achieve the maximum power point (MPPT) the machine side converter regulates the rotational speed of the PMSG to track the optimal speed delivered by MPPT block. To improve the performances of the generator side, the integral backstepping control approach (IBC) has been designed for MSC converter. Finally, to evaluate the effectiveness of the proposed strategy, a comparative study has been carried out between the IBC controller and Sliding Mode control (SMC) by simulation.